JPH0664015A - Molding condition changing method of injection molder under actual operation - Google Patents

Abstract

PURPOSE:To perform the partial change of only necessary parts of molding conditions through data communication from external apparatus during the actual operation of an injection molder. CONSTITUTION:A controlling device 10 contains a CPU 12, under the controlling of which an injection molder 24 is run on the basis of molding conditions stored in a running data memory 16 through a sequence. When the change of the molding conditions becomes necessary by judging from the monitoring data collected during the operation of the molder and the weight data of product, necessary change data is transmitted through a communication interface 18 to the CPU by means of the communication function of an external apparatus 22. The CPU once stores the change data in a change data holding memory 14. When each action of either one of the injection, metering, opening and closing or the like of the molder is brought to an end, the change data is read out of the memory 14 so as to re-write the molding conditions of the corresponding items in the running data memory 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for changing molding conditions of an injection molding machine which is in actual operation.

[0002]

2. Description of the Related Art Conventionally, it has been generally practiced to save molding conditions of an injection molding machine from an external device such as a personal computer to a storage device of a control device by data communication. For example, in Japanese Patent Laid-Open No. 60-196324, a control device for controlling an injection molding machine is connected to an external computer through an interface, and various types of operation data stored in the external computer are used in accordance with an operation schedule. Disclosed is an operation data switching device for an injection molding machine, which can collectively transfer several kinds of required data groups to an operation data setting memory in a control device before or after the injection molding machine is stopped. ing.

Further, in JP-A-1-288418, when an injection molding machine is operated in an environment where external conditions periodically change, a storage device in a controller of the injection molding machine which can communicate with a host computer is disclosed. An injection molding machine configured such that some molding conditions obtained in the first cycle are input and set from a keyboard in correspondence with time and stored in advance, and the molding conditions are automatically switched and selected as time passes. The automatic molding condition switching device is disclosed.

[0004]

However, according to the operation data switching device of the injection molding machine described above, the operation data in the operation data setting memory of the control device is managed for each group by the set value number, and the external data is controlled by the external device. When changing the data via communication, it is only possible to change the data collectively for each group, and when changing the molding conditions partially, there is no data communication method for only the changed part, so there is no choice but to input manually. It was For this reason, the change by data communication requires a change in all parameters, which takes time compared to changing only necessary parts. Moreover,
Changing the operation data by data communication cannot be performed during the automatic operation of the injection molding machine, and is limited to the stop before or after the injection molding machine is operated.

Further, according to the automatic molding condition switching device of the injection molding machine, the automatic switching of the molding conditions is a switching within the preset molding conditions, regardless of the operation of the injection molding machine from the outside. It was not possible to send change data of molding conditions to the controller at any time to make changes.

Therefore, conventionally, even in the case of a control device having an external communication function, it is necessary to manually transfer the operating conditions from the memory in which the molding conditions are stored in the control device and the start processing of the injection molding machine. Therefore, it has been difficult to make the molding plant unmanned and labor-saving.

Therefore, an object of the present invention is to use the data communication function of an external device such as a personal computer to change only a necessary part of the molding condition during the actual operation of the injection molding machine and to perform unmanned operation. It is an object of the present invention to provide a method for changing the molding conditions of an injection molding machine in actual operation, which can be applied to unmanned molding improvement and labor saving by changing the molding conditions inside.

[0008]

A method for changing a molding condition of an injection molding machine in actual operation according to the present invention monitors an operation of the injection molding machine, and automatically collects time, screw position and injection speed by this monitoring. , Injection pressure, mold temperature, and other monitored values and molded product weight data are analyzed to determine whether the molding conditions are good or bad. Based on the results of the quality judgment, the necessary data for changing the molding conditions is sent to an external device such as a personal computer. Transfer to the memory for storing change data in the control unit of the injection molding machine by using the data communication function of, and at the end of each operation such as injection, weighing, cooling, opening and closing of the mold, product unloading of the injection molding machine. It is characterized in that the molding conditions are changed by automatically rewriting the change data stored in the change data storage memory into the operation data memory in the control device.

[0009]

According to the method for changing the molding conditions of the injection molding machine in actual operation according to the present invention, it is necessary for the change data storage memory provided in the controller of the injection molding machine to be independent of the operation data memory. The change data is transferred by the communication function of an external device such as a personal computer even when the injection molding machine is actually operating. The control device reads the change data stored in the change data storage memory at the end of any of the operations such as injection, metering, cooling, mold opening / closing, and product removal of the injection molding machine, and the operation data memory Change the molding conditions by automatically rewriting the data of the corresponding items in.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for changing molding conditions of an injection molding machine in actual operation according to the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram of a control device to which a molding condition changing method for an injection molding machine according to an embodiment of the present invention is applied. In FIG. 1, reference numeral 10 is a control device of the injection molding machine, and the control device 10 includes a CPU 12, a change data storage memory 14, an operation data memory 16, a communication interface 18, and a sequencer 20. An external device 22 such as a personal computer is connected to the CPU 12 via the communication interface 18 of the control device 10, and the molding machine 24 is connected to the sequencer 20 of the control device 10.
Connected to. Here, FIG. 2 is a schematic explanatory view of the system configuration of the injection molding machine, and as shown in FIG. 2, the personal computer 26 is connected to the control device 10 via a cable 28 to perform bidirectional data communication to perform molding. The weight of the product molded by the machine 24 is monitored by the weight scale 30, and the monitoring result is transferred to the personal computer 26 via the cable 32. When the molding condition needs to be changed according to the monitoring result, the change data is sent from the personal computer 26 to the control device 10 via the cable 28.

A molding condition changing sequence of the injection molding machine thus constructed will be described with reference to the flow chart of FIG. First, the CPU 12 controls the sequencer 20 according to the molding conditions stored in the operation data memory 16 of the control device 10, and operates the injection molding machine 24 according to the output of the sequencer 20. In step 40, it is determined whether the injection molding machine needs to be continuously monitored. If the molding machine is continuously operated, the process proceeds to step 42. If not, the process ends. In step 42, monitoring of time, screw position, injection speed, injection pressure, mold temperature, etc. in each process until the end of one cycle of the injection molding machine 24, that is, the time when the mold clamping device of the molding machine opens the mold is automatically performed. To collect monitoring data. In step 44, the weight of the product molded in this one cycle is measured and the weight data is collected. Step 46
In, the collected monitoring data and weight data are analyzed. In step 48, the necessity of changing the molding conditions is determined based on the analysis result. If it is not necessary to change the molding conditions, the process returns to step 40, and if it is necessary to change the molding conditions, the process proceeds to step 50.
In step 50, the content of the change data for the item of the molding condition that needs to be changed is determined from the collected data. In step 52, the personal computer 2
Change data is transmitted to the control device 10 using the communication function of 6. At this time, the change data is stored in the change data storage memory 14 via the communication interface 18 of the control device 10 and the CPU 12. In step 54, C
The PU 12 reads the molding condition change data once stored in the change data storage memory 14, and rewrites the molding condition of the corresponding item in the operation data memory 16 to the contents of the change data. This rewriting can be instantaneously performed at the end of each operation of the injection molding machine 24 such as injection, weighing, cooling, mold opening / closing, and product removal, and the above-mentioned change data communication step 52 and molding condition changing step 54 are performed. In, there is no need to stop the operation of the injection molding machine. From the next molding cycle, injection molding is automatically performed under the changed molding conditions. After changing the molding conditions, the process returns to step 40.

[0013]

As is apparent from the above-described embodiments, according to the present invention, the operation of the injection molding machine is monitored and each monitoring value is automatically collected, and the quality of moving molding conditions is checked by a technician at a remote location. The modified molding conditions can be transferred to the control unit of the injection molding machine that is actually operating by data communication, and the molding conditions can be changed collectively or partially.This makes it ideal for unmanned molding sites. It is possible to continuously mold good products under various molding conditions without producing defective products.

Further, according to the present invention, since the operating condition is directly corrected, the change data of only the item to be corrected can be performed by the data communication, and the communication efficiency can be improved as compared with the case where all the molding conditions are changed by the data communication. Can be improved.

Furthermore, if the monitoring data and the corrected molding conditions are correlated, the corrected molding conditions are automatically calculated and sent to the control unit of the injection molding machine, the injection molding in actual operation according to the present invention. By applying the molding condition changing method of the machine, it is possible to achieve a completely unmanned system of the molding factory.

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various design changes can be made without departing from the spirit of the present invention. Is.

[Brief description of drawings]

FIG. 1 is a block diagram of a control device for an injection molding machine showing an embodiment to which a molding condition changing method for an injection molding machine according to the present invention is applied.

FIG. 2 is a schematic explanatory diagram of a system configuration of an injection molding machine to which a molding condition changing method for an injection molding machine according to the present invention is applied.

FIG. 3 is a flowchart of a molding condition changing sequence for explaining a molding condition changing method for an injection molding machine according to the present invention.

[Explanation of symbols]

 10 Control Device 12 CPU 14 Memory for Saving Change Data 16 Operation Data Memory 18 Communication Interface 20 Sequencer 22 External Equipment 24 Molding Machine 26 Personal Computer 28 Cable 30 Weight Scale 32 Cable

Claims (1)

[Claims] 1. The operation of the injection molding machine is monitored, and the monitoring values such as time, screw position, injection speed, injection pressure, mold temperature, etc. collected automatically by this monitoring and the weight data of the molded product are analyzed. The quality of the molding conditions is judged and based on the result of the quality judgment, the necessary modification data of the molding conditions is transferred to the modification data storage memory in the controller of the injection molding machine using the data communication function of the external device such as a personal computer. Then, the change data saved in the change data saving memory at the end of each operation such as injection, weighing, cooling, mold opening / closing, and product removal of the injection molding machine is stored in the operation data memory in the control device. A method for changing a molding condition of an injection molding machine in actual use, which is characterized by changing a molding condition by automatically rewriting.